| 摘要 |
The track pitches and linear velocities of a PCA area, a PMA area, and a read-in area, are similar to those of conventional media. On the contrary, at least one of them of a program area and a read-out area is smaller than those of the PCA area and the PMA area. Since, the track pitches and linear velocities of the PCA area, the PMA area and the read-in area are similar to those of the conventional ones, the read-in start radius, the program start radius, and the time from the read-in start to the program start can be determined within the standards. On the other hand, since, at least one of the track pitch and the linear velocity of the program area is smaller than those of the conventional ones, recording capacity of the program area can be increased.
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